Dental crown cap press



June124, 1947. M s uu s 2,423,041

DENTAL- cRpwu CAP PRESS Filed March 15, 1946 INVEN TOR. Anion 5F MiSlarna! I Patented June 24, 1947 DEnT LjQROWN on? .Pnnss. Application March 15, 1946, Serial No. 654,581

3 Claims.

My invention relates to appliances .employed in mechanical dentistry, and more particularly to presses for forming dental crown caps. These have a prescribed formation for every type of tooth, and it is one object of the present invention to provide a press having a series of units for the simultaneous formation of a set of caps of the conventional types, such as for bi-cuspids, molars, etc.

A further object is to provide a press of the above character which separates the forming units for upper crown caps from those for lower crown caps to avoid confusion.

Another object is to provide a crown cap press which operates on the double-throw principle, whereby to form upper crown caps by an action in one direction and lower crown caps by an action in the opposite direction.

An important object is to construct the press along lines of ruggedness and extreme simplicity.

With the above objects in view and any others which may suggest themselves from the description to follow, a better understanding of the invention may be had by reference to the accompanying drawing, in which- Fig. 1 is an elevation, partly in section, of the novel press as applied in one direction, dotted lines showing its application in the opposite di rection;

Fig. 2 is an enlarged end View from the righthand portion of Fig. 1, and partly in section on the line 2-2 of the same figure; and

Fig. 3 is an enlarged section on the line 33 of Fig. 1.

In accordance with the foregoing, specific reference to the drawing indicates the base of the press at ill, the same being a casting of bronze or other hard metal. The base is of elongated formation and rises in the middle with an integral standard II, which extends crosswise of the base and is of the same width, as shown in Fig. 3. The base is extended endwise with per-- forated lugs Illa for screws to secure the base on a bench or other support.

The standard I I is out down from the top in two places-one being indicated at l2 in Fig. 2- to define three alined bars [3; and the spaces l2 are designed to receive the ears [4 extending from the corresponding end of a massive rectangular block I5. A pintle l5a is passed through the ears I3 and M to dispose the block l5 in pivotal relation to the standard ll. The block [5 is extended outwardly with an arm l6; and the latter terminates with a looped handle H.

The block I5 is formed with a pair of ribs I8 2 on each side, these extending longitudinally near the side edges of the block. The ribs l8 on one side are extended with a longitudinal series of punches l9, these having terminal formations 20 suitable for impressing gold crown cap blanks (not shown) with the proper or prescribed forms to suit upper bi-cuspids, molars, etc. The crosssectional form of the punches I9 is circular, oval or otherwise elongated, according to the shape of the terminal profile.

When the block it: is positioned as shown in Fig. l, the punches IS on its under side press the cap sheets into matching indentations 2| in the top surface of the base, so that the caps are formed when the block is applied with pressure on the handle l1. However, When the block is swung in the direction of the arcuate arrow in Fig. 1 to assume the dotted line position a like set of punches 22 with terminal formations 23 and extending toward indentations 24 to shape caps for lower teeth functions in the same manner between the other side of the block and the corresponding part of the base.

The novel press, as described above, has a number of advantageous features. First it combines in a single, compact structure a complete set of forming units or dies for all the crown cap formation required. Further, the press is divided to locate the units for upper teeth separate from those for lower teeth, eliminating the prospect of confusion in this respect. Further, a single, sturdy member carries all the punches and is capable of being economically cast in one piece. Further, the said single member is capable of forming either set of caps by utilizing the double-throw principle, the pivotal attachment of such member in the center of the base leaving the adjacent surfaces of the same clear and accessible to the corresponding punches when the member is applied accordingly. Finally, the novel press is only made with two major parts and of sufficient strength to serve its purpose efiiciently.

While I have described the invention along specific lines, various minor changes or refinements may be made therein without departing from its principle, and I reserve the right to employ such changes and refinements as may come within the scope and spirit of theappended claims.

I claim:

1. A dental crown cap press comprising an elongated base with a standard in the center, the top surface of the base on one side of the standard having a series of indentations corresponding in formation to crown caps for upper teeth and on the other side a series of indentationS corresponding in formation to crown caps for lower teeth, and a member connected to the standard for movement in the direction of either series of indentations, such member presenting punches in either case matching and directed toward the related indentations.

2. The structure of claim 1, said member being pivoted to the standard to be swingable alternately toward either series of indentations with said punches extending from the sides of the member facing the corresponding series.

3. The structure of claim 1, the standard extending transversely of the base, said member being horizontally pivoted to the standard to be swingable alternately toward either series of indentations with said punche extending from the sides of the member facing the corresponding series, and a handle extending outwardly from the member.

: ANTON F. MISKUNAS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

